android: wm: add support for display rotation

Signed-off-by: hmz007 <hmz007@gmail.com>

frameworks/base/services/core/java/com/android/server/wm/WindowManagerShellCommand.java

@@ -78,6 +78,8 @@ public class WindowManagerShellCommand extends ShellCommand {
                     return runDisplayDensity(pw);
                 case "folded-area":
                     return runDisplayFoldedArea(pw);
+                case "rotation":
+                    return runDisplayRotation(pw);
                 case "scaling":
                     return runDisplayScaling(pw);
                 case "dismiss-keyguard":
@@ -316,6 +318,42 @@ public class WindowManagerShellCommand extends ShellCommand {
         return 0;
     }
 
+    private int runDisplayRotation(PrintWriter pw) throws RemoteException {
+        String rotationStr = getNextArg();
+        int rotation;
+        if (rotationStr == null) {
+            rotation = mInterface.getDefaultDisplayRotation();
+            pw.println("Current rotation: " + rotation);
+            return 0;
+        } else if ("help".equals(rotationStr)) {
+            pw.println("usage: wm rotation [0|90|180|270]\n");
+            return 0;
+        } else {
+            try {
+                rotation = Integer.parseInt(rotationStr);
+            } catch (NumberFormatException e) {
+                getErrPrintWriter().println("Error: bad number " + e);
+                return -1;
+            }
+            if ((rotation % 90) != 0) {
+                getErrPrintWriter().println("Error: rotation must be [0|90|180|270]");
+                return -1;
+            }
+        }
+
+        try {
+            // 0 - ROTATION_0
+            // 1 - ROTATION_90
+            // 2 - ROTATION_180
+            // 3 - ROTATION_270
+            rotation /= 90;
+            mInterface.freezeRotation(rotation);
+        } catch (RemoteException e) {
+            getErrPrintWriter().println("Error: Can't set display rotation " + e);
+        }
+        return 0;
+    }
+
     private int runDisplayScaling(PrintWriter pw) throws RemoteException {
         String scalingStr = getNextArgRequired();
         if ("auto".equals(scalingStr)) {
@@ -671,6 +709,8 @@ public class WindowManagerShellCommand extends ShellCommand {
         pw.println("    Return or override display density.");
         pw.println("  folded-area [reset|LEFT,TOP,RIGHT,BOTTOM]");
         pw.println("    Return or override folded area.");
+        pw.println("  rotation [0|90|180|270]");
+        pw.println("    Set display rotation.");
         pw.println("  scaling [off|auto] [-d DISPLAY_ID]");
         pw.println("    Set display scaling mode.");
         pw.println("  dismiss-keyguard");